package yang.learn.service;


import yang.learn.entity.Contacts;
import yang.learn.entity.User;

import java.util.List;

public interface ContactsService {

    public void add(Contacts contacts);

    public void del(Contacts contacts);

    public void change(Contacts contacts);

    public List<Contacts> queryAll(User user);

    public Contacts query(Contacts contacts);
}
